Adds Middleware API (#40)

* Adds test project

* Adds e2e for end-2-end tests

* Update gitignore

* Update loaders

* Creates test project

* v0.1.27

* Upgrade

* dependency fixes

* Load project plugins in the plugin loader

* Issue with instanceof

* Fixes versioning issues

* Adds medusa middleware api

* Adds documentation

* Fixes tests

e2e/prod-project/src/models/test.js

@@ -0,0 +1,12 @@
+import mongoose from "mongoose"
+import { BaseModel } from "medusa-interfaces"
+
+class TestModel extends BaseModel {
+  static modelName = "test"
+
+  static schema = {
+    title: { type: String, required: true },
+  }
+}
+
+export default TestModel